ABSTRACT

A weighted scaling method (WSM) is developed for the selection and modification of structure-specific earthquake records in time-history analysis. The matching errors and scaling factors are calculated by weighted least-squares method to match with target spectrum. The weight factors are determined by the modal-mass participation factors. The 3-, 9-, and 20-story steel moment-resisting frame structures are used as examples. Their mean structural responses were calculated by the WSM and the unweighted scaling method (USM). WSM is as accurate as USM for estimating mean structural responses, but WSM has a better capacity for reducing the variability of structural responses.

摘要

开发了一种加权标度法 (WSM)，用于在时程分析中选择和修改特定结构的地震记录。通过加权最小二乘法计算匹配误差和比例因子以与目标光谱匹配。权重因子由模态质量参与因子确定。以 3 层、9 层和 20 层钢抗弯框架结构为例。它们的平均结构响应是通过 WSM 和未加权缩放方法 (USM) 计算的。WSM 在估计平均结构响应方面与 USM 一样准确，但 WSM 在减少结构响应的可变性方面具有更好的能力。